Cone inserted tooth drill bit

Abstract

The cone inserted bit comprises a base, a connecting shaft is fixedly connected to the upper end of the base, a liquid conveying channel is formed in the connecting shaft, three water holes communicated with the liquid conveying channel are formed in the base, a filter screen plate is arranged at the end, away from the liquid conveying channel, in each water hole, and a self-cleaning mechanism is further arranged in each water hole. Compared with the prior art, the drilling bit has the advantages that impurities such as rock debris and mud can be effectively intercepted and prevented from entering a water hole in the drilling process through the arranged filter screen plate, so that the risk of water hole blockage is remarkably reduced, normal work of the drilling bit is ensured, the impeller is driven to rotate through flowing of drilling fluid, and the drilling efficiency is improved. The impeller drives the cleaning plate to self-clean the filter screen plate, and impurities on the filter screen plate are prevented from affecting flowing of drilling fluid.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of roller cone drill bit, especially to a roller cone insert bit. BACKGROUND

[0002] The roller cone drill bit is the most widely used drilling bit. When the roller cone drill bit works, the cutting teeth alternately contact the well bottom, the rock breaking torque is small, the cutting tooth and the well bottom contact area is small, the specific pressure is high, and the formation is easily eaten; the total length of the working blade is large, so the wear is relatively reduced. The roller cone drill bit can adapt to various strata from soft to hard.

[0003] In the use process of the traditional roller cone insert bit, the water eye on the drill bit is easily blocked by impurities such as rock debris and mud, which causes the cooling and chip removal functions of the drill bit to fail, and further affects the drilling efficiency and the service life of the drill bit. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a roller cone insert bit, which can effectively solve the problems in the background art.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme of a roller cone insert bit, which comprises a base, the upper end of the base is fixedly connected with a connecting shaft, the connecting shaft has a liquid delivery channel, the base has three water eyes which are in communication with the liquid delivery channel, a filter screen is arranged at the end of the water eye which is away from the liquid delivery channel, and a self-cleaning mechanism is further arranged in the water eye.

[0006] As a further description of the above technical scheme, the self-cleaning mechanism comprises a mounting seat, an impeller, a connecting rod and a cleaning plate, the mounting seat is arranged in the water eye, the impeller is rotatably arranged at the center of the upper side inner wall of the mounting seat, the lower end of the impeller is fixedly connected with the connecting rod, and the other end of the connecting rod is fixedly connected with the cleaning plate.

[0007] As a further description of the above technical scheme, the end of the water eye which is away from the connecting shaft is fixedly connected with a spray head.

[0008] As a further description of the above technical scheme, the spray head is designed in a conical shape, and the inner diameter gradually decreases.

[0009] As a further description of the above technical scheme, a plurality of hard bristles are arranged on the side wall of the cleaning plate which is close to the filter screen.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. Through the filter screen plate arranged, the impurities such as rock debris and mud can be effectively intercepted during the drilling process, and the impurities are prevented from entering the water eye, thereby the risk of water eye blockage is significantly reduced, the normal work of the drill bit is ensured, and the flow of the drilling fluid is utilized to drive the impeller to rotate, so that the impeller drives the cleaning plate to clean the filter screen plate, and the impurities on the filter screen plate are avoided to affect the flow of the drilling fluid. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a whole structure schematic view of the roller bit of the utility model;

[0013] Figure 2 It is a base sectional view of the roller bit of the utility model;

[0014] Figure 3 It is an enlarged view of A of the roller bit of the utility model;

[0015] Figure 4 It is a schematic view of the impeller structure of the roller bit of the utility model;

[0016] In the drawing: 1, base; 2, connecting shaft; 3, infusion channel; 4, water eye; 5, filter screen plate; 6, self-cleaning mechanism; 61, mounting seat; 62, impeller; 63, connecting rod; 64, cleaning plate; 7, spray head; 641, hard bristles. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features and achieved purposes of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0018] In the description of the utility model, it should be explained that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "another end" and the like are the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "set with", "connection" and so on, should do broad sense understanding, for example "connection", can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0020] Please refer to Figures 1-4 The utility model provides a toothed bit, including base 1, the upper end of base 1 is fixedly connected with connecting shaft 2, and connecting shaft 2 has infusion channel 3 in it, and base 1 has three water eyes 4 that are communicated with infusion channel 3 in it, and the end portion that is away from infusion channel 3 in water eye 4 is equipped with filter screen plate 5, filter screen plate 5 can effectively prevent the accumulation of rock debris and mud and other impurities in water eye 4 in the process of drilling, and self-cleaning mechanism 6 is also equipped in water eye 4.

[0021] Specifically, as shown in Figure 3 And Figure 4 A toothed bit, self-cleaning mechanism 6 includes mounting seat 61, impeller 62, connecting rod 63 and cleaning plate 64, mounting seat 61 is equipped in water eye 4, and impeller 62 is rotatably arranged at the center of the upper side inner wall of mounting seat 61, connecting rod 63 is fixedly connected to the lower end of impeller 62, and cleaning plate 64 is fixedly connected to the other end of connecting rod 63, when drilling fluid flows through mounting seat 61, it will drive impeller 62 to rotate, impeller 62 drives connecting rod 63 to rotate when rotating, so that cleaning plate 64 rotates, and cleaning plate 64 rotates to clean filter screen plate 5, to avoid impurities from blocking filter screen plate 5.

[0022] Specifically, as shown in Figure 1 A toothed bit, the end, away from connecting shaft 2, of water eye 4 is fixedly connected with spray head 7, and drilling fluid is sprayed out through spray head 7.

[0023] Specifically, as shown in Figure 3 A toothed bit, spray head 7 adopts conical design, and the inner diameter gradually decreases, which can increase the spraying speed and pressure of drilling fluid.

[0024] Specifically, as shown in Figure 4 A toothed bit, a plurality of hard bristles 641 are arranged on the side wall of cleaning plate 64 close to filter screen plate 5.

[0025] It should be noted that the utility model discloses a toothed bit, in the process of drilling, the filter screen 5 can effectively prevent the accumulation of rock debris and impurities such as mud in the water eye 4, the drilling fluid passes through the liquid channel 3 and enters the water eye 4, and then is sprayed to the cone through the spray head 7, when the drilling fluid flows through the mounting seat 61, the impeller 62 will be driven to rotate, the connecting rod 63 is driven to rotate when the impeller 62 rotates, so that the cleaning plate 64 rotates, and the filter screen 5 is cleaned by the rotating cleaning plate 64, avoiding that the impurities block the filter screen 5.

[0026] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A roller cone insert bit, comprising a base (1), the upper end of the base (1) is fixedly connected with a connecting shaft (2), characterized in that: The connecting shaft (2) has a transfusion channel (3), the base (1) has three water eyes (4) communicated with the transfusion channel (3), the water eye (4) is provided with a filter screen (5) at the end far from the transfusion channel (3), and the water eye (4) is also provided with a self-cleaning mechanism (6).

2. A roller cone insert bit according to claim 1, characterized in that: The self-cleaning mechanism (6) comprises a mounting seat (61), an impeller (62), a connecting rod (63) and a cleaning plate (64), the water eye (4) is provided with the mounting seat (61), the mounting seat (61) is provided with the impeller (62) rotatably at the center of the upper side inner wall, the lower end of the impeller (62) is fixedly connected with the connecting rod (63), and the other end of the connecting rod (63) is fixedly connected with the cleaning plate (64).

3. The hybrid roller cone drill bit of claim 1, wherein: The water eye (4) is fixedly connected with a spray head (7) at the end far from the connecting shaft (2).

4. The hybrid roller cone drill bit of claim 3, wherein: The spray head (7) is designed in a conical shape, and the inner diameter gradually decreases.

5. The insert bit according to claim 2, wherein: A plurality of hard bristles (641) are arranged on the side wall of the cleaning plate (64) close to the filter screen (5).

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